有脉纹的

例句：

1. 1. The doctor examined the patient's veins to determine if theywere swollen.
   医生检查了患者的静脉，以确定它们是否肿胀。
2. 2.Veins are responsible for carrying oxygenatedblood back to the heart.
   静脉负责将富含氧气的血液输送回心脏。
3. 3. Bloodvessels are essential for transporting nutrients andoxygen throughout the body.
   血管对于输送营养物质和氧气在整个身体中至关重要。